Active Time: 45 minutes | Total Time: 1 hour 30 minutes | Serves: 6 | Intensity: Medium
A Taste of French Comfort
Named after Antoine-Augustin Parmentier, the French agronomist who championed the potato in France, this gratin is the epitome of cuisine réconfortante (comfort food). It marries the heartiness of seasoned meatballs with the creamy decadence of thinly sliced potatoes, all baked under a blanket of gruyère until bubbling and golden. It’s a complete, satisfying one-dish wonder perfect for Sunday supper or a company-worthy weeknight dinner.
Ingredients
For the Meatballs:
1 lb (450g) ground beef (80/20 blend for best flavor)
1/2 lb (225g) ground pork
1 large egg, lightly beaten
1/3 cup Panko breadcrumbs
1/4 cup finely grated Parmesan cheese
3 tablespoons finely chopped fresh parsley
2 cloves garlic, minced
1 teaspoon dried thyme
1 teaspoon salt
1/2 teaspoon freshly ground black pepper
For the Gratin:
2.5 lbs (1.1 kg) Yukon Gold potatoes, peeled and very thinly sliced (1/8-inch thick)
1 tablespoon unsalted butter, softened
For the Béchamel Sauce:
4 tablespoons unsalted butter
1/3 cup all-purpose flour
3 cups whole milk, warmed
1/8 teaspoon freshly grated nutmeg
1 1/2 teaspoons salt
1/2 teaspoon white pepper
1 cup (about 4 oz) grated Gruyère cheese, divided
Equipment
Large baking dish (9×13 inch or similar 3-quart capacity)
Large skillet
Medium saucepan
Mandoline slicer (highly recommended for even potatoes)
Mixing bowls
Whisk
Step-by-Step Instructions
1. Prepare the Meatballs:
In a large bowl, combine the ground beef, ground pork, egg, Panko, Parmesan, parsley, garlic, thyme, salt, and pepper. Use your hands to mix gently but thoroughly until just combined. Avoid overworking. Shape the mixture into 1-inch meatballs (you should have about 24-28). Place them on a plate or baking sheet.
2. Brown the Meatballs:
Heat a large skillet over medium-high heat. Add a drizzle of neutral oil. Working in batches to avoid crowding, brown the meatballs on all sides, about 4-5 minutes total. They do not need to be cooked through, just nicely seared. Transfer to a clean plate. Set aside. Reduce oven temperature to 375°F (190°C).
3. Prepare the Potatoes & Béchamel:
While the meatballs brown, use a mandoline to slice the peeled potatoes into 1/8-inch thick rounds. Submerge them in a bowl of cold water to prevent browning.
For the béchamel, melt the 4 tablespoons of butter in a medium saucepan over medium heat. Add the flour and cook, whisking constantly, for 2 minutes to form a pale golden roux. Do not let it darken.
Gradually pour in the warm milk, whisking vigorously to prevent lumps. Continue to cook, whisking frequently, until the sauce thickens enough to coat the back of a spoon, about 5-7 minutes. Remove from heat. Stir in the nutmeg, salt, white pepper, and 1/2 cup of the grated Gruyère until the cheese is melted and the sauce is smooth.
4. Assemble the Gratin:
Grease your baking dish with the softened tablespoon of butter. Drain the potato slices and pat them very dry with a clean kitchen towel. This is crucial for a creamy, not watery, gratin.
Arrange half of the potato slices in an even, slightly overlapping layer on the bottom of the dish. Season lightly with a pinch of salt and pepper.
Distribute the browned meatballs evenly over the potato layer.
Pour half of the béchamel sauce over the meatballs, allowing it to seep down.
Arrange the remaining potato slices in a final, neat layer on top. Pour the remaining béchamel over the potatoes, shaking the dish gently to ensure it distributes evenly. Sprinkle the remaining 1/2 cup of Gruyère cheese over the top.
5. Bake to Perfection:
Cover the dish tightly with aluminum foil. Bake in the preheated 375°F (190°C) oven for 45 minutes.
Remove the foil and increase the oven temperature to 400°F (200°C). Continue baking, uncovered, for another 20-30 minutes, or until the top is deeply golden brown, the sauce is bubbling vigorously around the edges, and the potatoes are tender when pierced with a knife.
For an extra-crisp top, broil for the final 1-2 minutes, watching closely to prevent burning.
6. Rest and Serve:
Once out of the oven, let the gratin rest for 15-20 minutes. This allows the layers to set, making it much easier to serve neat portions. Garnish with a sprinkle of fresh chopped parsley if desired.
Serving Suggestions
This gratin is a hearty meal in itself. For a lighter accompaniment, serve with a simple Mixed Green Salad with a Dijon Vinaigrette. The sharp acidity of the vinaigrette cuts beautifully through the richness of the gratin. A crusty baguette is also non-negotiable for soaking up every last bit of sauce.
Storage & Reheating
Refrigerate: Cool completely, then cover tightly. It will keep for up to 3 days.
Reheat: For best results, reheat individual portions in a 350°F (175°C) oven until warmed through (about 15-20 minutes). You can also microwave, though the top will lose its crispness.
Freeze: Assemble and bake the gratin but reduce the final uncovered bake time by 10 minutes. Cool completely, wrap tightly, and freeze for up to 2 months. Thaw overnight in the refrigerator and reheat, covered, in a 350°F oven until hot throughout, finishing with a brief broil to re-crisp the top.
Nutrition Information (Per Serving)
Calories are an estimate and may vary based on specific ingredients and portion sizes.
Nutrient Amount % Daily Value*
Calories ~680 kcal
Total Fat 42g 54%
Saturated Fat 21g 105%
Cholesterol 165mg 55%
Sodium 1180mg 51%
Total Carbohydrate 38g 14%
Dietary Fiber 3g 11%
Sugars 8g
Protein 38g 76%
Vitamin D 1.5mcg 8%
Calcium 420mg 32%
Iron 3.5mg 19%
Potassium 1100mg 23%